JPH07330580A - Bath gent product - Google Patents

Abstract

PURPOSE:To obtain the easily handleable bath agent product excellent in the bath effect by together sealing a water-soluble bath agent and a water-insoluble bath agent. CONSTITUTION:The bath agent product is obtained by covering a polyvinyl alcohol film bag 4 receiving a water-soluble bath agent and a water-insoluble bath agent therein with a non-woven fabric 5 having a tearing strength of 0.36kg and a bulk density of 0.15-g/cc and comprising sheath-core type conjugate filaments having a single filament fineness of 3 denier and produced from polyethylene terephthalate as the core component and polyethylene as the sheath component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath agent product used as a bag.

[0002]

2. Description of the Related Art Conventionally, as a bath agent, a water-insoluble bath agent with relatively coarse particles made of herbs, herbs, trees, etc., and an inorganic substance such as anhydrous sodium sulfate, sodium hydrogen carbonate, sodium chloride, etc. There are water-soluble bath agents with relatively fine particles such as salts. The former is housed in a non-woven bag or the like, and is packaged in a packaging material laminated with aluminum (so-called aluminum pack) so as not to impair the fragrance effect and the like, and is commercialized.
The latter is stored in a container made of plastic or the like, or is used as a bath agent by aluminum-packing a single use.

[0003]

However, in the case where the above water-soluble substance is contained in the container, there is a problem that it is time-consuming to measure the amount of use each time the bath is taken. In order to solve the problem, the aluminum pack that is used for one use has a problem that it takes more work because the packaging material must be broken at the time of use.

When the non-water-soluble bath agent is contained in a non-woven bag, the water-insoluble bath agent may be broken without being able to withstand the mechanical force of a jet bath or the like, and the water-insoluble bath agent may leak from the bag. there were.

Further, when it is desired to enjoy both the bath effects of the water-soluble and water-insoluble bath agents, the water-soluble and water-insoluble bath agents are separately stored, so that they can be taken out and placed in a bathtub. There was a problem that it took a lot of work because it had to be inserted. For this reason, even if you try to store both in a non-woven bag, there is no problem with non-water-soluble ones with coarse particles, but water-soluble ones with fine particles may leak from the non-woven bag and cause a problem. there were.

The present invention solves such a problem and is an easy-to-handle bath agent having an excellent bath effect, in which both water-soluble and water-insoluble bath agents can be enjoyed without much trouble. It is intended to provide a product.

[0007]

The present invention achieves the above object and has the following structure. That is,
The gist of the present invention is a bath agent product characterized in that a water-soluble film bag containing a bath material inside is covered with a nonwoven fabric having a tear strength of 0.15 kg or more.

The present invention will be described in detail below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing an example of the bath agent product of the present invention. In FIG. 1, a bath agent product 1 of the present invention has a bag of a water-soluble film 4 containing a water-soluble bath agent 2 and a non-water-soluble bath agent 3 as a bath agent, with a tear strength of 0.15 k.
It is covered with a non-woven fabric 5 of g or more and is sealed by the ears 6. FIG. 2 is a plan view showing an example of the bath agent product of the present invention.

The water-soluble film used in the present invention may be any one which has a gas barrier property when it dissolves in water and the bath agent does not leak, and examples thereof include a polyvinyl alcohol polymer, sodium polyacrylate, polyethylene glycol, Examples thereof include sodium salt of carboxymethyl cellulose.

The film is preferably a polyvinyl alcohol polymer. In particular, the average molecular weight is 1600 to 20
A polyvinyl alcohol polymer of 00 is preferred. If the average molecular weight of the polyvinyl alcohol polymer is more than 2000, the solubility in hot water is lowered, and it becomes difficult to elute the water-soluble bath agent at the time of use, and the bath effect cannot be obtained, which is not preferable. If it is less than 1600, the film strength tends to decrease, which is not preferable.

The saponification degree of the polyvinyl alcohol polymer is preferably in the range of 80 to 95 mol%. 95 mol%
If it exceeds the range, the solubility in warm water decreases, and it becomes difficult to elute the water-soluble bath agent at the time of use, and the bath effect cannot be obtained, which is not preferable. On the other hand, if it is less than 80 mol%, the tackiness is increased, so that it tends to be taken by a machine during the filling and packaging process and the workability is deteriorated, which is not preferable.

As the nonwoven fabric used in the present invention, a nonwoven fabric having a tear strength of 0.15 kg or more is used. If the tear strength is less than 0.15 kg, it may be damaged by external force, which is not preferable.

The single yarn fineness of the fibers constituting the non-woven fabric used in the present invention is preferably 1 to 7 denier, more preferably 3 to 5 denier, depending on the intended use of the present invention. Moreover, the bulk density of the nonwoven fabric used in the present invention is preferably 0.05 to 0.3 g / cc, and more preferably 0.1 to 0.2 g / cc. Non-woven bulk density is 0.05g
/ Cc and the single yarn fineness of the fibers constituting the non-woven fabric exceeds 7 denier, the gap between the fibers constituting the non-woven fabric becomes large, and the water-insoluble bath agent having coarse particles contained therein The bulk density of the non-woven fabric is 0.05g.
If it is less than / cc and the single yarn fineness of the fibers constituting the non-woven fabric is less than 1 denier, the strength of the non-woven fabric is reduced, which is not preferable. The bulk density of the non-woven fabric is 0.3 g / c
If it exceeds c and the single yarn fineness of the fibers constituting the non-woven fabric is less than 1 denier, the gap between the fibers constituting the non-woven fabric becomes small and the non-woven fabric becomes a dense non-woven fabric, which makes it difficult for water to flow in the bag and is water-soluble. The elution time of the bath agent is longer, the water-insoluble bath agent is less likely to be extracted, and the bath effect is reduced.
Moreover, the cost increases, which is not preferable.

As the constituent fibers of the non-woven fabric used in the present invention, it is preferable to mainly use those composed of a fiber-forming thermoplastic polymer such as a polyolefin-based polymer, a polyester-based polymer, or a polyamide-based polymer. More preferably, a core-sheath type in which a fiber-forming thermoplastic polymer is used as a core component as a part of the constituent fibers, and a fiber-forming thermoplastic polymer having a melting point lower than the melting point of the polymer by at least 20 ° C. is used as a sheath component. Use composite fibers.

In this core-sheath type composite fiber, when the difference in melting point between the polymers of the core component and the sheath component is less than 20 ° C., the fibers are made into a web, and the fibers are heat-bonded by a heat-bonding treatment to form a nonwoven fabric. When treated at high temperature, the polymer of the sheath component on the fiber surface melts at least at the fiber crossing points and the fibers adhere to each other, but the polymer of the core component deteriorates due to heat and the tensile strength and tear strength of the fiber itself. And bending strength is reduced.
On the other hand, when treated at a low temperature, the polymer of the core component does not deteriorate by heat, but the polymer of the sheath component does not melt sufficiently at the fiber intersections, so that the fibers do not adhere to each other and the strength of the nonwoven fabric decreases, and in extreme cases , Even non-woven fabric form is not retained.
Therefore, the melting point difference between the core component and the sheath component should be at least 20.
When the temperature is set to ℃, the polymer of the sheath component is partially melted at least at the fiber intersections by the heat-bonding treatment, and each network-like fusion bond is formed, so that the strength of the nonwoven fabric is improved, and the polymer of the core component is Since the fiber structure is maintained without heat deterioration, the strength of the nonwoven fabric can be maintained. When heat-sealing during bag making, the strength of the heat-sealed portion can be maintained and the ears do not peel off.

The combination of the core component polymer and the sheath component polymer is preferably compatible with each other. As a specific combination, a polyethylene terephthalate polymer as the polymer of the core component, a polyester-series polymer / polyolefin polymer core-sheath structure using a polyethylene polymer as the polymer of the sheath component, or the core component A polypropylene-based polymer as a polymer and a core-sheath structure of a polyolefin-based polymer / polyolefin-based polymer using a polyethylene-based polymer as a polymer of a sheath component are available.

Among these combinations, a polyethylene terephthalate polymer is used as the core component polymer in terms of tensile strength and productivity of the nonwoven fabric, and an adhesive property when the sheath component polymer is made into a nonwoven fabric by heat bonding treatment, From the standpoint of spinnability and the like, core-sheath type conjugate fibers using a polyethylene-based polymer or a polypropylene-based polymer are more preferable.

The composite ratio (weight ratio) of the polymer of the core component and the polymer of the sheath component of the core-sheath type composite fiber can be arbitrarily set, but it is 7 / in terms of the strength of the fiber itself and the thermal adhesion between the fibers. 3 to 1/9
Is preferred.

The non-woven fabric used in the present invention is made into a non-woven fabric by webbing the fibers and thermally adhering the fibers by a heat-bonding treatment. As the heat bonding treatment method, a hot embossing roll, a hot calendar roll, a hot air circulating dryer, a rotary drum dryer, or the like is used.

The basis weight of the nonwoven fabric used in the present invention is preferably 10 to 50 g / m ² and more preferably 15 to 30 g / m ² depending on the intended use of the present invention. When the basis weight of the non-woven fabric is less than 10 g / m ² , the amount of the fibers constituting the non-woven fabric tends to be small and the strength of the non-woven fabric tends to decrease, and the uniformity of the non-woven fabric tends to decrease. This is not preferable because the agent may leak out and the original function of the package may be impaired. When the basis weight of the non-woven fabric exceeds 50 g / m ² , it becomes difficult for water to flow, the inner water-soluble film becomes difficult to dissolve, the elution time of the water-soluble bath agent becomes long, the bath effect is reduced, and the cost is also low. It is not good to go up.

The bath agent used in the present invention is not particularly limited as long as it has a bathing effect. For example, as water-soluble agents, inorganic salts such as anhydrous sodium sulfate, sodium hydrogen carbonate and sodium chloride, and water-insoluble agents are used. Examples include herbs, herbs and trees. That is, the bath product of the present invention contains both a water-soluble and a water-insoluble bath agent together.

The bath agent product of the present invention comprises, for example, two water-soluble films laminated on a non-woven fabric, and the non-woven fabric is laminated on the non-woven fabric to form a bag. It is obtained by containing a bath agent and sealing. At this time, two laminated bodies in which the water-soluble film and the non-woven fabric are integrated by a thermocompression bonding method using a conventional heat roller or the like or a dry laminating method may be used in the form of a bag with the water-soluble film side as the inside. . It can also be obtained by wrapping a bath agent in a water-soluble film and sealing the bath agent in a non-woven fabric bag to prevent leakage. Examples of the method for bag making and sealing include a bonding method using a heat calender roll, an ultrasonic fusing machine, a heat sealing machine, and a stitch processing method such as suturing with a thread. It may be selected as appropriate.

[0023]

The bath product of the present invention is obtained by packaging a bath agent with a non-woven fabric and a water-soluble film, so that the water-soluble and water-insoluble bath agents are contained together. Therefore, before use, the inner water-soluble film acts as a barrier layer to prevent the water-soluble bath agent with fine particles from falling off, and the various components in the bath agent are volatilized to the outside through the bag. It is possible to prevent the occurrence of moisture absorption and moisture absorption from the outside. The outer non-woven fabric prevents damage due to external forces. Next, at the time of use, the bath agent product of the present invention can be put into the bath as it is, and it takes time and effort to take out the bath agent by breaking the packaging material such as aluminum as in the conventional case. The bath agent product of the present invention placed in the bathtub has a water permeability of the non-woven fabric, whereby the water-soluble film on the inside is dissolved and the water-soluble bath agent contained therein is rapidly eluted, and the water-soluble bath agent is not water-soluble in the non-woven bag. It is in a state where the sexual bath agent is contained. Next, water circulates in the bag due to the original filter characteristics of the non-woven fabric, the water-insoluble bath agent is extracted, and the bath effect can be easily achieved by using both the water-soluble substance and the water-insoluble substance together. Further, since the non-woven fabric is excellent in strength, the non-water-soluble bath agent inside does not leak due to the non-woven fabric bag being ruptured by the impact of a jet of water when taking a bath.

[0024]

EXAMPLES Next, the present invention will be specifically described with reference to examples. The present invention is not limited to these examples. In the examples, each characteristic value was measured by the following method. Nonwoven fabric tear strength (kg): A total of 10 sample pieces were prepared and measured based on the pendulum method of JIS L-1096. Melting point (℃): Differential scanning calorimeter DS manufactured by Perkin Elma
Using a C-2 type, the measurement was carried out at a temperature rising rate of 20 ° C./min,
The temperature that gives the extreme value in the obtained melting endothermic curve was taken as the melting point. Non-woven fabric areal weight (g / m ² ): 10 from the standard state sample
After making 10 sample pieces in total of 10 cm x 10 cm and reaching the equilibrium moisture content, the weight (g) of each sample piece was weighed, and the average value of the obtained values was taken as the unit area (m ² ). It was converted into a hit and used as the basis weight of the nonwoven fabric. Bulk density (g / cc): sample width 10 cm, sample length 10 cm
5 samples were prepared and the thickness of each non-woven fabric was measured by applying a load of 4.5 g weight / cm ² with a thickness measuring instrument manufactured by Daiei Kagaku Seiki Seisakusho. The bulk density of the nonwoven fabric was determined by the method. Bulk density (g / cc) = (Basis weight) / (Thickness) / 1000

Example 1 The core component was polyethylene terephthalate (melting point, 265
℃), the sheath component is polyethylene (melting point, 125 ° C.), the core-sheath composite long fiber having a core-sheath composite ratio (weight ratio) of 5/5 and a single yarn fineness of 3 denier is formed into a web to form a hot embossing roll (temperature: 124). ℃, dot pattern is hexagonal dot shape, pressure contact area ratio 1
6%, linear pressure 50 kg / cm) was applied to partially heat-bond the fibers to heat-bond them to obtain a nonwoven fabric having a basis weight of 20 g / m ² , a bulk density of 0.15 g / cc and a tear strength of 0.36 kg. .
On the obtained non-woven fabric, two polyvinyl alcohol films having an average molecular weight of 1800 and a saponification degree of 90 mol% and a thickness of 0.03 mm are superposed, the non-woven fabric is superposed on the polyvinyl alcohol film, and the three sides thereof are ultrasonically fused. After sealing with a machine, filling anhydrous sodium sulfate / sodium hydrogen carbonate / sodium chloride as a water-soluble bath agent and herbs / trees as a non-water-soluble bath agent, the opening is ultrasonically fused. The product was sealed with to obtain a bath agent product.

Example 2 A core-sheath type composite fiber having a core component of polyethylene terephthalate, a sheath component of polyethylene, a core-sheath composite ratio (weight ratio) of 5/5 and a single yarn fineness of 7 denier was formed into a web and hot embossed roll ( The temperature is 124 ° C., the dot pattern is hexagonal dot shape, the pressed area ratio is 16%, the linear pressure is 50 kg / cm, and the fibers are heat-bonded to make a basis weight of 20 g / m ² , bulk density of 0.05 g. A non-woven fabric having a tear strength of 0.19 kg was obtained. Obtained nonwoven fabric, average molecular weight 1800, saponification degree 9
A polyvinyl alcohol film having a thickness of 0 mol% and a thickness of 0.03 mm was applied to a heat calendar roll (temperature 127 ° C., linear pressure 30).
(kg / cm) to form a laminate by thermocompression bonding. Next, the two laminates are stacked with the non-woven fabric side facing outward, and the three sides are sealed with an ultrasonic fusion machine,
After the water-soluble and water-insoluble bath agents used in Example 1 were accommodated through the openings, the openings were sealed using an ultrasonic fusion machine to obtain bath agent products.

Example 3 0.03 in thickness having an average molecular weight of 1800 and a saponification degree of 90 mol%
A water-soluble and water-insoluble bath agent used in Example 1 was wrapped with a polyvinyl alcohol film having a thickness of mm and sealed with a heat sealer so as not to leak. Next, a core-sheath type composite fiber having a core component of polyethylene terephthalate, a sheath component of polyethylene, a core-sheath composite ratio (weight ratio) of 5/5 and a single yarn fineness of 1 denier is formed into a web and hot embossed roll (temperature: 12).
4 ° C, dot pattern is hexagonal dot-like, pressed area ratio 16%,
A linear pressure of 50 kg / cm) is applied to the fibers to heat-bond them to give a basis weight of 20 g / m ² and a bulk density of 0.3 g / c.
A non-woven fabric having a c and tear strength of 0.48 kg was obtained. Two pieces of the obtained non-woven fabric were overlapped, and three sides thereof were heat-sealed using a heat-sealing machine to obtain a non-woven fabric bag. A bath agent product was obtained by placing the polyvinyl alcohol film wrapped with the bath agent in the non-woven fabric bag and sealing it with a heat sealer.

Example 4 A core-sheath type composite fiber having a core component of polyethylene terephthalate, a sheath component of polyethylene, a core-sheath composite ratio (weight ratio) of 5/5, and a single yarn fineness of 3 denier was webbed into a hot embossing roll ( The temperature is 124 ° C., the dot pattern is hexagonal dot shape, the pressed area ratio is 4%, the linear pressure is 50 kg / cm, and the fibers are heat-bonded to make a basis weight of 50 g / m ² and a bulk density of 0. A non-woven fabric with a tensile strength of 03 g / cc and a tear strength of 0.62 kg was obtained. A bath product was obtained in the same manner as in Example 1 except that the above nonwoven fabric was used.

Example 5 The core component was polyethylene terephthalate, the sheath component was polyethylene, the core-sheath composite ratio (weight ratio) was 5/5, and the single yarn fineness was 0.8.
Dener core-sheath composite fibers are made into a web and hot-embossed (temperature: 124 ° C, dot pattern is hexagonal dots,
Heat-bonding treatment is performed using a pressed area ratio of 8% and a linear pressure of 50 kg / cm, and the fibers are heat-bonded to have a basis weight of 50 g / m ² ,
A nonwoven fabric having a bulk density of 0.15 g / cc and a tear strength of 0.51 kg was obtained. A bath product was obtained in the same manner as in Example 1 except that the above nonwoven fabric was used.

Comparative Example 1 A core-sheath type composite fiber having a core component of polyethylene terephthalate, a sheath component of polyethylene, a core-sheath composite ratio (weight ratio) of 5/5 and a single yarn fineness of 3 denier was formed into a web and hot embossed roll ( A temperature of 124 ° C., a dot pattern of hexagonal dots, a pressed area ratio of 35%, and a linear pressure of 50 kg / cm) are used to perform a heat-bonding treatment to thermally bond the fibers to a basis weight of 20 g / m ² ,
A nonwoven fabric having a bulk density of 0.35 g / cc and a tear strength of 0.12 kg was obtained. A bath product was obtained in the same manner as in Example 1 except that the above nonwoven fabric was used.

Comparative Example 2 Polyethylene terephthalate was used as the core component, polyethylene was used as the sheath component, the core-sheath composite ratio (weight ratio) was 5/5, and the single yarn fineness was 10
Dener core-sheath composite fibers are made into a web and hot-embossed (temperature: 124 ° C, dot pattern is hexagonal dots,
Heat-bonding treatment is performed using a pressed area ratio of 25% and a linear pressure of 50 kg / cm, and the fibers are heat-bonded to give a basis weight of 20 g /
A nonwoven fabric with m ² , bulk density of 0.15 g / cc and tear strength of 0.09 kg was obtained. A bath product was obtained in the same manner as in Example 1 except that the above nonwoven fabric was used.

The bathing effects (leakage prevention property, dissolution / extractability) of the obtained bath agent products of Examples 1 to 5 and Comparative Examples 1 and 2 were evaluated according to the following methods, and the results are shown in Table 1. Indicated. Leakage prevention property: The bath agent product obtained above was put in a jet bath and after bathing, the presence or absence of leakage of the non-water-soluble bath agent was visually observed outside the bag. Solubility / Extractability: When the bath agent product obtained above was put in a jet bath, the presence or absence of elution of the water-soluble bath agent and the presence or absence of the extractability of the non-water-soluble bath agent were visually observed.

[0033]

[Table 1]

In the bath products of Examples 1 to 3, when placed in a bath at the time of bathing, the polyvinyl alcohol film on the inside is dissolved, the water-soluble bath agent is quickly dissolved, and the non-water-soluble bath agent is extracted. I enjoyed the bathing effect of using both water-soluble and water-insoluble bathing agents. When the bath agent product of Example 4 was put in a bathtub during bathing, when the polyvinyl alcohol film on the inside was dissolved, the bulk density of the non-woven fabric was low, and the interfiber voids constituting the non-woven fabric were large, so the water-insoluble bath agent leaked slightly. I put it out. When the bath agent product of Example 5 was placed in the bathtub during bathing, the constituent fibers of the non-woven fabric were small in the single yarn fineness and the gaps between the fibers were small and dense. The polyvinyl alcohol film became difficult to dissolve, and it took time to elute the water-soluble bath agent and extract the water-insoluble bath agent. On the other hand, when the bath agent product of Comparative Example 1 is put in the bathtub when taking a bath, the texture is hard because the bulk density of the nonwoven fabric is high, and the gaps between the fibers are small and dense, so it is difficult for water to flow in the bag of the nonwoven fabric. However, the inner polyvinyl alcohol film became difficult to dissolve and the water-soluble bath agent was difficult to elute, and the water-insoluble bath agent was difficult to be extracted. On the other hand, since the non-woven fabric has poor tear strength, the non-woven fabric was torn by the impact of water flow after a while, and the water-insoluble bath agent leaked out and spread into the bath, which was not practical. When the bath agent product of Comparative Example 2 was put in a bathtub during bathing, when the polyvinyl alcohol film on the inside was dissolved, the non-aqueous bath agent in the bag of the non-woven fabric leaked out because the non-woven fabric had large gaps between the fibers. On the other hand, since the non-woven fabric was inferior in tear strength, the non-woven fabric was torn by the impact of water flow, and the water-insoluble bath agent was further leaked and spread into the bath, which was not practical.

[0035]

The bath products of the present invention are easy to handle and can accommodate water-soluble and water-insoluble bath agents together, so that the excellent bath effects of both combined use can be easily enjoyed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a bath agent product of the present invention.

FIG. 2 is a plan view showing an example of a bath agent product of the present invention.

[Explanation of symbols]

 1 Bath agent product 2 Water-soluble bath agent 3 Water-insoluble bath agent 4 Water-soluble film 5 Nonwoven fabric 6 Ear

Claims (4)

[Claims] 1. A bath agent product, wherein a water-soluble film bag containing a bath agent inside is covered with a nonwoven fabric having a tear strength of 0.15 kg or more. 2. The water-soluble film has an average molecular weight of 1600.
The bath agent product according to claim 1, which is a polyvinyl alcohol polymer having a saponification degree of 2000 and a saponification degree of 80 to 95 mol%. 3. The single yarn fineness of the fibers forming the non-woven fabric is 1 to
7 denier and the bulk density of the nonwoven fabric is 0.05 to
It is 0.3 g / cc, The bath agent product of Claim 1 or Claim 2 characterized by the above-mentioned. 4. A part of the constituent fibers of the nonwoven fabric has a fiber-forming thermoplastic polymer as a core component and a fiber-forming thermoplastic polymer having a melting point at least 20 ° C. lower than the melting point of the polymer as a sheath component. The bath agent product according to claim 1 or 2 or 3, which comprises a core-sheath type composite fiber.